Q
What is the outcome of typeof [1, 2, 3] in JavaScript?

Answer & Solution

Answer: Option D
Solution:
The typeof operator returns 'object' for arrays in JavaScript.
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Which of these is a complex or reference data type in JavaScript?

A). Number

B). Boolean

C). Object

D). String

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A). '5'

B). 5

C). '10'

D). 10

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A). String

B). Object

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What will let x = null; console.log(typeof x); output in JavaScript?

A). Object

B). Null

C). Undefined

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Which of the following is a primitive data type in JavaScript?

A). Object

B). Array

C). Function

D). Boolean

Which of the following is not a valid data type in JavaScript?

A). Array

B). Symbol

C). Map

D). Tuple

Which operator checks if an object is an instance of a specific object type in JavaScript?

A). instanceof

B). typeof

C). isInstanceof

D). isTypeOf

Which data type represents unique and immutable values in JavaScript introduced in ES6?

A). Symbol

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D). Function

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A). Infinity

B). 0

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What is the data type of the value true in JavaScript?

A). Number

B). String

C). Boolean

D). Undefined